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化学学报
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化学学报 ›› 1963, Vol. 29 ›› Issue (5): 344-347. 上一篇    下一篇

研究简报

4-(4’-硝基萘重氮氨基)偶氮苯用作微量鎘的比色测定

陶鴻根, 任世宣, 汪乃經   

  1. 上海第一医学院化学教研组
  • 投稿日期:1960-07-19 发布日期:2013-06-03

CADION 2B AS A REAGENT FOR COLORIMETRIC DETERMINATION OF CADMIUM

DAO HONG-KANG, JEN SHIH-HSAN, WANG NAI-CHING   

  1. Shanghai First Medical College
  • Received:1960-07-19 Published:2013-06-03

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试鎘剂2B学名为4-(4'-硝基萘重氮氨基)偶氮苯[4-(4'-nitronaphthalenediazoamino)azobenzene, cadion 2B].Dwyer研究试鎘剂2B的酒精溶液在2N氢氧化钾溶液中与一般阳离子的反应, 并推荐作鎘离子和镁离子的定性分析试剂.沈乃葵等曾观察试镉剂2B在不同酸碱性条件下对各种阳离子的反应, 并认为试镉剂2B的丙酮溶液较其乙醇溶液更佳.

The detection of cadmium with the aid of Cadion 2B as proposed by Dwyer has been applied to the colorimetric determination of cadmium.The colored suspension formed is unstable, but it can be stabilized by addition of 1% gelatin solution.The conditions of determination have been investigated with a spectrophotometer(Unicam SP.500) and are summarized briefly as follows:1.The reagent Cadion 2B has a maximum absorption at 590 mμ; in presence of an excess of cadmium the maximum shifts to 510 mμ.